Condition analysis: The most common metastatic site of lung cancer is bone, especially for small-cell lung cancer and poorly differentiated non-small-cell lung cancer, the incidence rate is around 30%, and it mostly occurs in vertebrae, ribs and pelvic bones, while limbs are less common. Symptoms of bone metastasis of lung cancer in early stage are not obvious, and pain is the most prominent symptom of bone metastasis of advanced lung cancer.

Suggestion: Bone metastasis of lung cancer is characterized by fixed position, gradually worsening pain, which is more obvious at night; thoracic spine metastasis produces girdle-like pain; lumbar spine metastasis is often characterized by radiating pain along the lateral side of lower limbs to the lateral side of feet, which is aggravated with coughing, defecation and other activities. Similar to osteophytes or disc prolapse sciatica, should be vigilant.